Disk sound-reproducing machine.



T. H. MACDONALD. DISK SOUND REPRODUGING MACHINE.

APPLICATION FILED MAY 23, 19Q5.

Patented May 10, 1910.

' be capable of transmittin vmcmrzn.

men scnnn- To all wb'cm "it may concern."

Be it known that L '5; 031m; H. All), :1 resident of Bridgeport, UOllIle'iUi-l'fill have. invented a new we useful l niprcve incnt in Disk S0s mi-Rcpicducing Machines, which invention is fully set forth in the in? loving specification.

This invention relates to talking chines, and more particularly t0 the c known as disk machines, in Wi' "cli there prcclucer is cnrrietl on the end of a swinging arm which capable of n'icving transversely across the lace cf the record (inning the act of rcprocluct-icn.

The object of the invention tcpro vicle n ccnstructicn 0f swinging arm w ii" shall readily respond in a vertical direction t0 an y irregulafitic's in the surface cf the till) let and at the same time be capable m"- incving tinn veiseiy zicicss the Llnce of ti c reccni without the necessity of carrying 01" moving the nsuzillicrn, and at the tiinc the ecnnd vibraticns from the hollow s inging arm in the born without loss 01. mccinic ticn (l to an imperfect or incomplete union between the swinging arm. 7 ch moves and the lac which, during the act cl? 'i'cprcclncticn, stationary.

NlOJTB-QVQI the invcnticn-lnie 'l'ci' its abject to provide a conrst L... l011 wlicr in the horn may be readily t uincd s0 to dim great volume of tiiescnncl in in diitection without the necessity of incving the machine, and. furthermore cf attaining l the repij'cclncer to the hollow swinging mun in such a Way to {H'Oltl tlli low c1; ecnnci vibraticnc or )nclliticnticns tl' Willi this cbject in View the linenticn consists oi" the usual stuiinnfiry snppci ting arm attached. in any suitable nizn'mcr to the machine casing, which supporting arm is provided with an annular letlge npcn which rests in ring, free to turn in n horizontal plane on the ledge, the interior face of the.

ring being cut on the lines cl n Sphere whose center is the ccntci oi? the rim" ccmhinec with n hollow=i'cpi'uducing nn'i having 2. splici-icnl end 11g fitting within the Qplienicnl poi-Lion the ring and capable of re; :ing' in a vertical plane about trunnicns passing through the ring and. into the spherical pci'ticn cf the swin ing :u'm.

u i by iL clump- ;o the s-niicnr 1' m ntin i suitable )W swing ill- cnd that and corn .icllow arm to or diminution n the ncccnn \LlVQ- idea, in

n id 2:

ling to tli J indicates tlie c, nn-tl 2 the tv nun secured able inceins the arm 2 has formed on. the .lc 1; {i on i the ring 2 a sphere wlicse ln: ting 5. The as is usual in arms and has its outer end i, the extei'isn Sill ace cl the ipper end of the arm having a splieii'icizl surly-ice 8 corresponding '2 h the interior spherical surface of the i-ingfi, fitting sun; 3' tlicrein. lrunnicns 9-4), pi'cicrabl in tnc form of screws, are puseca'l through the ring into the material nit the spherical V crticn cf tiic hollow arm, said trunnion-$5 bein dininetrically wining": centers 1 mini be rocked ;;e nini at seine time usual 01 A. a f 19 bani tnis c mincler, formed in the shape cl. unclbcw in n cing capable of revolving in a horizontal lane carrying the ring F4 "h it, which eves upon the bearing lodge Immeiateiy above the ring 5 is an annular ledge of somewhat greater diameter than the edge i, upon which rtsts the flange ll of the zasc portion 12 of the horn 1.3, the same ng' held in position means of a clamping; ring i l secured by screws 15 passing into the body of the stationary arm 2, the dianieter oi the ringi i being less than the exterior diameter of the flange on the horn. The horn is retained in position on said stationar Y arm w said Uldll'lljlllll lin 1% While 1 ii I;

at the same time nnng free to entirely revolve in a horizontal plane so as to direct the open end of the horn in any direction Withoct moving the cas ng IV of the machine.

Referring to Fig. 2, i6 is the usual or any suitable reprodncer head "which is secured to the flange 17 on the end of. the swingin arm by any suitable means, as by screws 18, "which or insulated from the metal of the flange 1'? by rubber gaskets 19, an annular gasket 20 being interposed between the face of the flange 17 and the inner face of the reproducer head 16. this means a nerfectly closed jointbetween the inner face of the'reprodncer head and the face of the flange on the swinging arm is secured, and at the same time all danger of transmission of foreign vibrations through the clamping screws 18 to the metal of the swinging arm and thence to the horn is avoidcc.

As before stated, the joint for. 16d between the end of the swinging arm and the ring 5 is packed with a suitable no n-fluid lubricant, as petroleum jelly, whereby the joint is perfectly'sealed and at the same time friction avoided.

21 indicates a lug on the under side oi the swinging arm (3, which is normally opposite to but out of engagement with :1 corresponding lug 9.2 on the stationa rm 2. ll hen the reproducing needle 2 i.-. rcinoved froa n the lOPIOtlHCOI, or whenever a record tablet absent from the machine, the tsic'a' 'cmant of the lug :21 on the swinging arm ah the lug 22 on the stationary arm acts to support the same and prevent it "from 11 ting upon the tablet or upon the talvlet-holdor.

It will be perccivcll'l'laat in the cons tion thus devised, there is provided a so ing arm which has great frccdon'i of movement While at the same time there is no ioint between said arm and its snmiort which would in any way interfere with the accurate transmission of thesound vibrations, which latter are transmitted free [mm the introduction of foreign viorations ol. any kind Whatever. Moreover, it will no pl"- ceivod that the horn itself has absolute t head to the end of tho swinging arm is such interior d the introduction 0 this point 1 in-chine, the combination corresponding to a spherical zone w lioso center the center of the ring, a hollow swinging arm carrying the reproducsr at one end, the other end having its exterior surface in the form of a spherical Zone fitting snugly Within said ring, and diametrically opposite trnn'nions engaging said ring and hollow arsn.

The combination of a swinging carrying the reprodncer at one end, ring within Which the other end of the arm is joined on lines corresponding to a portion of the surface of a sphere, trnnnions securing said ring and arm together, and a stationary arm supporting said rin 3. The combination of a swinging arm carrying the reprodncer at one end, a stationary arm, a ring mounted on said stationary arm to turn infa horizontal plane and trunnions connecting the ring to the swinging arm to permit said arm to turn in a vertical plane.

i. The combination of a stationary arm, a, substantially horizontal hollow swinging arin having a vertically extending elbow at one end and a reprodncer at the othcrend,

.a horizontal ring jointed to said elbow on F. The combination of a stationary arm having an annular ledge formed thereon, a ring resting on said ledge, a hollow swinging arm hinged to said ring, a second annular ledge on said stationary arm above .the li :iL mentioned lodge, a horn having a l! n ed base resting on said second ledge, clamping device engaging the flange llOill sccnril'ig it in position to he l ed on said second ledge.

a talking machine the combination lionary and a swinging arm, a flexibetween the tavo arms, and a non- :1 lluld oil .01. lubricant sealing said joint.

8. The con'xliination of a swinging arm carrying; the rcproduccr at one end, a stationary arni having 21 circular opening provided with a ircular bearing upon its inner wall, supporting incnns supported by and to turn upon said bearing and liori/(mtal tl'unui-ms supported by said means and enhaving a lilll for said tu and tube and engaging said bearing to support said tube ing movement of said tube gaging said swinging arm at its other end to permit vertical movement of said swinging arm.-

9. In a talking machine the combination with a sound conveying tube, a fixed support having a circular opening therein, a horizontal circular bearing provided upon one of said arts, circular supporting means conforming to said opening and permit horizontal swingand opposite horizontal trunnions' supported by said fixed support to support said conveying tube and to permit vertical swinging movement of said conveying tube. a

10. The combination of a swinging arm carryingthe reproducer at one end, a fixed support having a circular opening inwhich the other end of saidcarm is situated, supportingnieans interposed between the end of the arm situated Within said circular opening and saidfixed support and movably engaging one of said parts to permit the arm to turn in a horizontal plane, and a connection between said supporting means and the other of said parts to permit said arm to turn in a vertical plane.

11. The combination of a swinging arm carrying the reproducer at one end, a fixed support having a circular opening in which the other end of said arm is situated, supporting means interposed between the end of the arm situated within said circular' opening and said fixed support and movably engaging one of said parts topermit the arm to turn'in a horizontal plane, and trunnions connecting said supporting means with the other arm to turn in a vertical plane.

12.- The combination of aswinging arm carrying the reproducer at one end, a staof said parts to permit said .tionary arm having a fixed support, and trunnions secured to the swinging arm and carried by the fixed support.

In testimony whereof I have signed this specification in the scribing witnesses.

. THOS. H. MACDONALD. Witnesses:

A. B. KEOUGH, C. A. GIBNER.

presence of two sub- 

